ObjectDB Database Search

Jakarta Persistence (JPA) provides a comprehensive set of annotations and enums for mapping object ... and schema definitions Use the following annotations to map entities to database tables and define ... . A container annotation for defining multiple @SecondaryTable entries. Specifies a unique constraint

Jakarta Persistence (JPA) uses annotations to define metadata that governs how the persistence engine manages objects and their database mappings. These annotations configure entity behavior ... Use class-level annotations to define persistent types and configure class-level behavior: Define

Jakarta Persistence (JPA) provides a set of annotations to define and map native SQL queries ... and ignores these annotations , they remain essential for applications interacting with relational ... the following annotations : Specifies a named native SQL query using the underlying database's specific SQL

Jakarta Persistence (JPA) provides standard annotations to manage dependencies on container ... using the following annotations : Expresses a dependency on a container-managed EntityManager , injecting ... ). A container annotation for declaring multiple @PersistenceContext definitions on a single class

of references to other entities. Jakarta Persistence (JPA) provides annotations to configure relationships. Relationship annotations Use the following annotations to define the multiplicity and ownership ... you to explicitly specify these annotations for simple relationships. However, using them is necessary

Jakarta Persistence (JPA) provides lifecycle callback annotations to trigger custom logic during specific entity state transitions. These annotations allow you to define methods within an entity or ... can be further configured with annotations that specify lifecycle event listeners. Specifies one or more callback

Jakarta Persistence (JPA) annotations define how entity attributes (fields and properties) are managed. These annotations control data persistence behavior, including fetching strategies ... using the following annotations : Sets a field or property of a basic attribute (e.g., primitives

You can use Jakarta Persistence (JPA) annotations to mark classes as persistent and to configure their behavior. Persistent type definitions Use these annotations to assign a role to a persistent ... ). Use these annotations to configure the access type: Sets the access type (FIELD or PROPERTY

Jakarta Persistence (JPA) provides annotations to define static, reusable queries at the class ... the following annotations : Specifies a static, named query in the Jakarta Persistence Query Language (JPQL ... . A container annotation that groups multiple @NamedQuery definitions on a single class. Supplies parameters

for primary key fields, but ObjectDB extends support to regular persistent fields. Several annotations ... behavior using the following annotation and enumeration: Specifies that the property or field value ... specific generator logic at the class level using these annotations : Defines a named primary key

Named entity graphs provide a static mechanism for defining fetch plans using annotations ... named entity graphs at the class level using the following annotations : Specifies a named entity graph ... plan. A container annotation used to group multiple @NamedEntityGraph definitions on a single entity

either the Java transient modifier (which also affects serialization) or the JPA @Transient annotation ... the @Transient annotation ). Storing an entity object in the database does not store methods or code ... ). Every persistent field can be marked with one of the following annotations : OneToOne , ManyToOne

definition uses JDO’s @Index and @Unique annotations to define indexes (JPA's @Index  cannot be applied to fields): import javax.jdo. annotations .Index; import javax.jdo. annotations .Unique ... of the @Index or @Unique annotations : @Entity @Index ( members ={"lastName","firstName"}) public class

, package and private ) but should not be static . The annotation specifies when the callback method ... it with more than one annotation . By default, a callback method in a super entity class is also invoked for entity ... annotation : @Entity @EntityListeners (MyListener.class)     public class

way to declare a class as an entity is to mark it with the Entity annotation : import javax ... can be set explicitly by using the name attribute of the Entity annotation : @Entity ( name ="MyName ... object. A class is declared as embeddable by marking it with the Embeddable annotation : @Embeddable

Marking a field with the @GeneratedValue annotation specifies that a value will be automatically ... also supports this annotation for non-key numeric persistent fields as well. Several different value generation ... number generator is also used to generate numeric values for primary key fields annotated by

and @NamedQueries Annotations The following  @NamedQuery annotation defines a query ... : @NamedQuery ( name ="Country.findAll", query ="SELECT c FROM Country c") The  @NamedQuery annotation ... for the  setLockMode and  setHint methods. Every  @NamedQuery annotation is attached

that are added to the default META-INF/orm.xml mapping file. Every annotation that is described in ... to annotations . Both JPA mapping files and JDO package.jdo files are supported. This manual focuses on using annotations which are more common and usually more convenient. Details on using XML metadata

automatically : } The @Id annotation marks a field as a primary key field. When a primary key field is defined ... ; @GeneratedValue annotation specifies that the primary key is automatically allocated by ObjectDB. Automatic value ... class using the @IdClass annotation . The ID class reflects the primary key fields and its objects

using XML and annotations . Zero administration. Documentation Compressive, up to date, searchable ... to ObjectDB. Persistence is set using JPA/JDO annotations (e.g. @Entity , @Id , @Index ). Transparent ... Criteria Query API . Static definition ( named queries ) in annotations (@NamedQuery) and XML. Query

, query facilities, metamodel details, configuration options, annotations , and exception information ... configuration options for common JPA operations. Details the annotations used to define the persistent object

FetchType . LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not distinguish ... annotations (currently ObjectDB does not distinguish between the two) enables cascading retrieval

, however, that only classes which are marked as persistable by annotations (e.g. @Entity , @Embeddable ... may only be accessed directly from annotated persistable user classes. Enhancement by a Java agent is very easy

that is marked ( annotated ) as having the ability to represent objects in the database. Conceptually ... is an ordinary Java class. The only unique JPA addition is the @Entity annotation , which marks the class as

Most Jakarta Persistence configuration is static, defined through annotations (e.g., @Entity , @Table ) or set globally at the persistence unit level during bootstrapping . This section describes ... with annotations ), JPA follows a hierarchical override model: EntityManagerFactory (global

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.EmbeddedId Implemented Interfaces: Annotation Target: Method, Field Specifies that the annotated persistent field or property of an entity class or mapped superclass is the composite primary key of the entity. The type of the annotated

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.CollectionTable Implemented Interfaces: Annotation Target: Method, Field Specifies the table that is used for the mapping of collections ... of the Column annotation . In the case of a basic type, the column name is derived from the name

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Convert Implemented Interfaces: Annotation Target: Method, Field, Type Specifies how the values of a field or property are converted ... of an embedded type or inherited mapped superclass. It is not necessary to use the Basic annotation (or

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.IdClass Implemented Interfaces: Annotation Target: Type Specifies a composite primary key type whose fields or properties map to the identifier fields or properties of the annotated entity class. The specified primary key type

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Converter Implemented Interfaces: Annotation Target: Type Declares that the annotated class is a converter and specifies ... and must be annotated with the Converter annotation or declared as a converter in the object/relational

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Entity Implemented Interfaces: Annotation Target: Type Declares that the annotated class is an entity. The annotated entity class ... annotation , and may have one or more secondary tables, mapped using the SecondaryTable annotation

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.SequenceGenerator Implemented Interfaces: Annotation Target: Type, Method, Field, Package Defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation . A sequence

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.TableGenerator Implemented Interfaces: Annotation Target: Type, Method, Field, Package Defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation . A table

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Enumerated Implemented Interfaces: Annotation Target: Method, Field Specifies that a persistent property or field should be persisted as an enumerated type. This annotation is optional if the type of a persistent field or property

, that is based on (or derived from) the Work and for which the editorial revisions, annotations

name annotation element. Multiple range variables are allowed. For example, the following query

. annotation .Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind. annotation .RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller ... ); } } The GuestController class is defined as a Spring managed web controller using the @Controller annotation

.http.HttpServletRequest; import org.springframework.beans.factory. annotation .Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind. annotation .RequestMapping ... a Spring managed web controller using the @Controller annotation . A GuestDao component

.transaction. annotation .Transactional; @Component public class GuestDao { // Injected database ... it into the  em field (because it is annotated with the  @PersistenceContext annotation ). Handles transactions automatically for methods that are annotated with the  @Transactional

.springframework.transaction. annotation .Transactional; @Component public class GuestDao { // Injected database ... it into the  em field (because it is annotated with the  @PersistenceContext annotation ). Handles transactions automatically for methods that are annotated with the @Transactional annotation

should represent Point objects in the database. Apart from the @Entity annotation and the id field (and its annotations ) - the Point class is an ordinary Java class. The next step is adding to the project

objects in the database. Besides the @Entity annotation and the id field (and its annotations

(because it is annotated with the  @PersistenceContext annotation ). Handles transactions automatically

; The new class should represent Guest objects in the database. Besides the @Entity annotation and the id field (and its annotations ) - the Guest class is an ordinary Java class. The next step is adding

.ejb.EJB; import javax.servlet.ServletException; import javax.servlet. annotation .WebServlet; import ... ; guestDao field automatically (since the field is marked with the  @EJB annotation ). The next step

. Besides the @Entity annotation and the id field (and its annotations ) - the Guest class is an ordinary Java

(because it is annotated with the @PersistenceContext annotation ). Handles transactions automatically using

; import javax.servlet. annotation .WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet ... annotation ). The next step is adding a JSP page that will serve as the application view and will produce the guestbook output.

content: The settings above guides Spring to support annotations (for components, controllers

with the following new content: The settings above guides Spring to support annotations (for components